NCIDQ IDFX PREP EXAM |ACTUAL QUESTIONS AND
VERIFIED ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
Which type of plan is always needed to begin space planning in an existing building?
(A) base plan
(B) circulation plan
(C) exiting plan
(D) reflected ceiling plan
CORRECT ANSWER
(A) base plan
The answer is A. A base plan shows the layout of the existing building. It is always needed to
begin the interior design space plan.
Question 2
For most planning problems, the MOST efficient type of circulation system is a...
(A) radial system
(B) single-loaded corridor system
(C) double-loaded corridor system
(D) grid system
CORRECT ANSWER
(C) double-loaded corridor system
The answer is C. Because a double-loaded corridor system serves rooms on both sides of it
in a straight line, this is the most efficient option for most interiors. Radial and grid systems
1
,generally have much higher proportions of corridor-to-space served than double-loaded
systems do.
Question 3
According to William Peña's book, Problem Seeking, all design problems can be stated in
terms of form, and which three other factors?
(A) analysis, synthesis, and function
(B) function, economy, and time
(C) goals, facts, and function
(D) economy, time, and synthesis
CORRECT ANSWER
(B) function, economy, and time
The answer is B. Design problems can be stated in terms of form, function, economy, and
time. Each of these statements can be further broken down into more specific terms. For
example, the economy can be studied in terms of initial cost, operating cost, and life-cycle
cost.
Question 4
Interior spaces often need to be multifunctional or flexible. What are the three
components of flexibility as a programmatic design concept?
(A) versatility, convertibility, and grouping
(B) expandability, hierarchy, and flow
(C) flow, hierarchy, and convertibility
(D) convertibility, expandability, and versatility
CORRECT ANSWER
(D) convertibility, expandability, and versatility
2
,The answer is D. The three components of flexibility are convertibility, expandability, and
versatility. Convertibility refers to a space's usefulness for different functions through the
conversion of the space. Expandability refers to a space's ability to accommodate growth
through expansion. Versatility refers to a space's ability to accommodate a variety of
activities.
Question 5
A residential design in a rural area involves the addition of two bedrooms and two
bathrooms. Which of the following should be the two GREATEST concerns during the
home's due diligence investigation?
(A) neighborhood character and zoning setbacks
(B) zoning setbacks and septic capacity
(C) heating system capacity and septic capacity
(D) zoning height limitations and heating system capacity
CORRECT ANSWER
(C) heating system capacity and septic capacity
The answer is C. Rural areas tend to use septic tank systems rather than sewer systems.
Because the addition includes two bathrooms, the home's septic capacity should be a
primary concern during the due diligence investigation. The addition of two bedrooms
would also increase the home's heating requirements, so the heating system's capacity
should also be a primary concern of the investigation.
Although zoning setbacks, neighborhood character, and zoning heights should be
reviewed in any due diligence investigation, they are less of a concern in rural areas than
in cities because rural houses are typically much farther apart.
Question 6
3
, A new office suite is planned for the fifth floor of the building. Which of the following
existing characteristics would MOST affect egress planning?
(A) location of stairs and the presence of a sprinkler system
(B) size of the existing building and fire rating of the existing corridors
(C) area and shape of the fifth floor and the location of the stairs
(D) location of the elevators and area of the fifth floor
CORRECT ANSWER
(C) area and shape of the fifth floor and the location of the stairs
The answer is C. The location of the stairs is the primary factor in determining where and
how the new space's exit access door or doors should be located. Exit access travel distance
and the number and length of dead-end corridors should all be minimized, and the common
path of egress travel should be considered. Furthermore, the area and shape of the existing
floor plate could affect the exit access travel distance and, therefore, the layout of the new
space.
The presence of a sprinkler system could have an effect on egress planning, but a smaller
one. The fire rating of the existing corridors and the location of the elevators will
generally have little or no effect on where to locate the exit access doors
Question 7
During preliminary planning for a daycare center in a low-rise office building, the interior
designer discovers that the zoning ordinance limits the area of such centers to about 20%
less than the client's programmed needs. How could the interior designer best attempt to
resolve the problem?
(A) apply for a conditional use permit
(B) suggest the client apply for a variance
(C) reduce the area planned to that allowed
(D) appeal to the local planning commission
CORRECT ANSWER
(B) suggest the client apply for a variance
4
VERIFIED ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
Which type of plan is always needed to begin space planning in an existing building?
(A) base plan
(B) circulation plan
(C) exiting plan
(D) reflected ceiling plan
CORRECT ANSWER
(A) base plan
The answer is A. A base plan shows the layout of the existing building. It is always needed to
begin the interior design space plan.
Question 2
For most planning problems, the MOST efficient type of circulation system is a...
(A) radial system
(B) single-loaded corridor system
(C) double-loaded corridor system
(D) grid system
CORRECT ANSWER
(C) double-loaded corridor system
The answer is C. Because a double-loaded corridor system serves rooms on both sides of it
in a straight line, this is the most efficient option for most interiors. Radial and grid systems
1
,generally have much higher proportions of corridor-to-space served than double-loaded
systems do.
Question 3
According to William Peña's book, Problem Seeking, all design problems can be stated in
terms of form, and which three other factors?
(A) analysis, synthesis, and function
(B) function, economy, and time
(C) goals, facts, and function
(D) economy, time, and synthesis
CORRECT ANSWER
(B) function, economy, and time
The answer is B. Design problems can be stated in terms of form, function, economy, and
time. Each of these statements can be further broken down into more specific terms. For
example, the economy can be studied in terms of initial cost, operating cost, and life-cycle
cost.
Question 4
Interior spaces often need to be multifunctional or flexible. What are the three
components of flexibility as a programmatic design concept?
(A) versatility, convertibility, and grouping
(B) expandability, hierarchy, and flow
(C) flow, hierarchy, and convertibility
(D) convertibility, expandability, and versatility
CORRECT ANSWER
(D) convertibility, expandability, and versatility
2
,The answer is D. The three components of flexibility are convertibility, expandability, and
versatility. Convertibility refers to a space's usefulness for different functions through the
conversion of the space. Expandability refers to a space's ability to accommodate growth
through expansion. Versatility refers to a space's ability to accommodate a variety of
activities.
Question 5
A residential design in a rural area involves the addition of two bedrooms and two
bathrooms. Which of the following should be the two GREATEST concerns during the
home's due diligence investigation?
(A) neighborhood character and zoning setbacks
(B) zoning setbacks and septic capacity
(C) heating system capacity and septic capacity
(D) zoning height limitations and heating system capacity
CORRECT ANSWER
(C) heating system capacity and septic capacity
The answer is C. Rural areas tend to use septic tank systems rather than sewer systems.
Because the addition includes two bathrooms, the home's septic capacity should be a
primary concern during the due diligence investigation. The addition of two bedrooms
would also increase the home's heating requirements, so the heating system's capacity
should also be a primary concern of the investigation.
Although zoning setbacks, neighborhood character, and zoning heights should be
reviewed in any due diligence investigation, they are less of a concern in rural areas than
in cities because rural houses are typically much farther apart.
Question 6
3
, A new office suite is planned for the fifth floor of the building. Which of the following
existing characteristics would MOST affect egress planning?
(A) location of stairs and the presence of a sprinkler system
(B) size of the existing building and fire rating of the existing corridors
(C) area and shape of the fifth floor and the location of the stairs
(D) location of the elevators and area of the fifth floor
CORRECT ANSWER
(C) area and shape of the fifth floor and the location of the stairs
The answer is C. The location of the stairs is the primary factor in determining where and
how the new space's exit access door or doors should be located. Exit access travel distance
and the number and length of dead-end corridors should all be minimized, and the common
path of egress travel should be considered. Furthermore, the area and shape of the existing
floor plate could affect the exit access travel distance and, therefore, the layout of the new
space.
The presence of a sprinkler system could have an effect on egress planning, but a smaller
one. The fire rating of the existing corridors and the location of the elevators will
generally have little or no effect on where to locate the exit access doors
Question 7
During preliminary planning for a daycare center in a low-rise office building, the interior
designer discovers that the zoning ordinance limits the area of such centers to about 20%
less than the client's programmed needs. How could the interior designer best attempt to
resolve the problem?
(A) apply for a conditional use permit
(B) suggest the client apply for a variance
(C) reduce the area planned to that allowed
(D) appeal to the local planning commission
CORRECT ANSWER
(B) suggest the client apply for a variance
4
